Leviticus 13:18-23

18“Now when the 1body has a boil on its skin and it is healed, 19and in the place of the boil there is a white swelling or a reddish-white, bright spot, then it shall be shown to the priest; 20and the priest shall look, and behold, if 2it appears to be deeper than the skin, and the hair on it has turned white, then the priest shall pronounce him unclean; it is the infection of leprosy, it has broken out in the boil. 21But if the priest looks at it, and behold, there are no white hairs in it and it is not deeper than the skin and is faded, then the priest shall 3isolate him for seven days; 22and if it spreads farther on the skin, then the priest shall pronounce him unclean; it is an infection. 23But if the bright spot remains in its place and does not spread, it is only the scar of the boil; and the priest shall pronounce him clean.